import 'package:flutter/material.dart';
import 'package:english_words/english_words.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // final wordPair=new WordPair.random();
    // return MaterialApp(
    //   title: 'Flutter Demo',
    //   theme: ThemeData(
    //     primarySwatch: Colors.blue,
    //   ),
    //   home: new Scaffold(
    //     appBar: new AppBar(
    //       title: new Text("Welcome to Flutter"),
    //     ),
    //     body: new Center(
    //       child: new Text(wordPair.asPascalCase),
    //     ),
    //   )
    // );
    // return new MaterialApp(
    //   title: "welcome to flutter",
    //   home: new Scaffold(
    //     appBar: new AppBar(
    //       title: new Text("welcome to flutter"),
    //     ),
    //     body: new Center(
    //       child: new RandomWords(),
    //     ),
    //   ),
    // );

    return new MaterialApp(
      title: "Startup Name Generator",
      theme: new ThemeData(
        primaryColor: Colors.white,
      ),
      home: new RandomWords(),
    );
  }
}

class RandomWords extends StatefulWidget {
  @override
  createState() => new RandomWordsState();
}

class RandomWordsState extends State<RandomWords> {
  final _suggestions = <WordPair>[];
  final _biggerFont = const TextStyle(fontSize: 18.0);

  final _saved = new Set<WordPair>();

  @override
  Widget build(BuildContext context) {
    // final wordPair=new WordPair.random();
    // return new Text(wordPair.asPascalCase);
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Startup Name Generator"),
        actions: <Widget>[
          new IconButton(icon: new Icon(Icons.list), onPressed: _pushSaved)
        ],
      ),
      body: _buildSuggestions(),
    );
  }

  void _pushSaved() {
    Navigator.of(context).push(new MaterialPageRoute(builder: (context) {
      final titles = _saved.map((pair) {
        return new ListTile(
          title: new Text(
            pair.asPascalCase,
            style: _biggerFont,
          ),
        );
      });
      final divided =
          ListTile.divideTiles(context: context, tiles: titles).toList();
      return new Scaffold(
        appBar: new AppBar(
          title: new Text("saved Suggestions"),
        ),
        body: new ListView(children: divided),
      );
    }));
  }

  Widget _buildSuggestions() {
    return new ListView.builder(
        padding: const EdgeInsets.all(16.0),
        itemBuilder: (context, i) {
          if (i.isOdd) return new Divider();
          final index = i ~/ 2;
          if (index >= _suggestions.length) {
            _suggestions.addAll(generateWordPairs().take(10));
          }
          return _buildRow(_suggestions[index]);
        });
  }

  Widget _buildRow(WordPair pair) {
    final alreadySaved = _saved.contains(pair);
    return new ListTile(
      title: new Text(
        pair.asPascalCase,
        style: _biggerFont,
      ),
      trailing: new Icon(
        alreadySaved ? Icons.favorite : Icons.favorite_border,
        color: alreadySaved ? Colors.red : null,
      ),
      onTap: () {
        setState(() {
          if (alreadySaved) {
            _saved.remove(pair);
          } else {
            _saved.add(pair);
          }
        });
      },
    );
  }
}
